BTS in 2017: A Timeline of the Year's Biggest Highlights

BTS poses for a portrait during the 2017 American Music Awards at Microsoft Theater Nov. 19, 2017 in Los Angeles.

A look back at the year that saw BTS become the most popular Korean act in the world.

As 2017 dwindles away, <a href="/music/bts">BTS</a> leaves behind not only their own biggest year ever, but the most impactful year ever in the U.S. for a Korean group. The past 12 months have been eventfully full of releases and exciting moments that propelled the boy band from a fan favorite to major American award shows and the top tiers of Billboard's most important charts.

Here's a look back at some of the highlights of BTS' year:

Jan. 1: RM (formerly known as Rap Monster) released "Always" on Soundcloud.

Jan. 30: BTS appeared at the Idol Star Athletics Championship, an annual Lunar New Year broadcast where K-pop stars face off against one another in a variety of sporting events.

Feb. 12: Release of "Spring Day" from You Never Walk Alone, the extended re-release of 2016's Wings.

March 4: "Spring Day" appeared at No. 15 on the Bubbling Under Hot 100 chart, foreshadowing the group's success later this year at breaking into the Hot 100.

March 17: The septet performed at the opening night of the first-ever KCON Mexico.

March 23: BTS kicked off the U.S leg of 2017 BTS Live Trilogy Episode III: The Wings Tour at the Newark Prudential Center in New Jersey. A second show took place on the 24th. They also performed at three more shows in Chicago and Anaheim over the next week. The tour saw them head to several cities throughout Asia in April, May, June and October, and also brought them to Australia for the first time in May for a performance in Sydney.

March 29: Security was increased for BTS' remaining American concert stops after social media threats were aimed at the band members.

May 8: Announcement of BTS attending the BBMAs, the first ever for a K-pop boy band.

May 21: The septet wins the top social artist award at the 2017 BBMAs, the first Korean group to ever receive an honor at the ceremony. It was the first time a K-pop group attended a stateside award show.

June 14: Suga remakes "So Far Away" with Jin and Jungkook. The song was originally released featuring Suran on Suga's Agust Dmixtape last year.

July 4: BTS extended their branding to include "Beyond the Scene" as part of the band's identity. Despite it being widely reported as an expansion of their name, Billboard confirmed that BTS' name in English remains BTS, an acronym for their Korean name, Bangtanseonyeondan, which translates to "Bulletproof Boy Scouts."

Sept. 24: The group made K-pop history by becoming the first Korean act to break into the top 10 of the Billboard 200, spurring fans to dub the number seven as BTS' lucky number of the year: In 2017, the seven-member act peaked at No. 7.

Sept. 29: JJ Ryan discussed on the Billboard Chart Beat Podcast being the one radio station in the U.S. to play "DNA." BTS' songs increasingly gained radio play in the country this year, due to the grassroot efforts of fans.

Oct. 2: "DNA" peaked at No. 67 on the Hot 100 chart. The previous week, it debuted at No. 85.

Nov. 15: BTS appeared on Jimmy Kimmel Live! While in Los Angeles, the group held a mini-concert for fans, and performances from that show were later aired on Live the following week. They also appeared on The Ellen DeGeneres Showand The Late Late Show with James Corden.

Dec. 6: BTS released "Snow Crystal" in Japan along with Japanese versions of "Mic Drop (Remix)" and "DNA." It went on to become the first song by a non-Japanese artist to ever exceed 300,000 points on Japan's Oricon Weekly Single Chart.

Dec. 7: The Seoul tourism site crashed after fans descend on it to download BTS' promotional track "With Seoul."

Dec. 11: BTS appeared at No. 10 of the Billboard Year-End Artists of the Year chart.

Dec. 12: BTS confirmed rumors that they will perform on Dick Clark's New Year's Rockin' Eve with Ryan Seacrest.